I've been debating saying anything because I don't want tons of people suddenly taking advantage of it, but I realize it'll become widespread knowledge eventually and I'd rather Blizzard correct it now if they deem it worth messing with.
This isn't a bug or exploit, just probably not something that is 'working as intended'.
In Act 2, take the waypoint 'Path to the Oasis' (or whatever it's called at the oasis entrance).
Immediately scope out the area to the NE of the oasis entrance. You're looking for the mini-dungeon event entrance labeled 'Ransacked Cellar' (you might see 'Rotting Cellar' as well in the same spot, it's not the one you're after).
Go down and there's a very fast little fight and an NPC opens up his basement, there are two chests -- 1 normal and 1 resplendent that always has good loot; I tend to get 2-3 blues, sometimes a rare, at least 2 gems and 1-2 artisan pages every time. There's a resplendent chest in this cellar 100% of the time.
I'm pretty sure this pops up somewhere in the oasis every single generation, but it often shows up very close to the WP entrance which makes checking for it there very quickly very easy. Quite simple to check for it, run it if it's there, and then TP, exit game, Resume game, check again. You can do it 12-15 times an hour without even trying to be fast.
I don't think it's quite gamebreaking but it obviously lets you pile up some nice drops very quickly. I'm worried about more spots like this becoming known / farmed / botted, so here's to hoping Blizzard tweaks this ASAP.
Edited by Kiserai, 19 May 2012 - 02:50 AM.